Grand Lord Crisis - ruler of Crisis Empire. Heard in episode 42. Appears in episodes 46 & 47. Voice provided by Naya, Gor˘!
Crisis Warlord Jak - commander of the invasion force sent to conquer earth. Appears in episodes 1-46. Played by Takahashi, Toshimichi. For his final battle with Kamen Rider Black RX, Crisis Warlord Jak is altered, made more powerful.
Colonel Maribaron - sorceress, second highest ranking officer of Crisis. The only Crisis Empire officer to appear in all 47 episodes. Loyal to Crisis Warlord Jak even over Grand Lord Crisis. Actually cares about her fellow Crisis officers and is upset when they are killed. I wanted her to kill Dasmada (see below) rather than for RX to do it. Only Crisis officer not killed by RX. Played by Takahata, Junko.
Captain Gedorian - in command of alien lifeforms unit. Appears in episodes 1-42. Played by Watanabe, Minoru.
Captain Gatenzone - the robot in charge of other robots. Appears in episodes 1-43. Played by Kitamura Takayuki.
Naval Captain Bosgan - armed with jagged demon sword and dagger, commands Man-Beast unit. Appears in episodes 1-44. Played by Fujiki, Yoshikazu.
General Dasmada - Grand Lord Crisis' right-hand man. Sent to Earth after the take over is constantly delayed by Kamen Rider Black RX. Most wicked of the lot. Has no compassion for the other Crisis officers when they are killed. He betrayed Crisis Warlord Jak. General Dasmada had a dark secret (spoiler warning) which is only revealed at the end of the series. Appears in episodes 28-47. Played by Tetsuya, Matsui.
Service droid Chakrum, announced Crisis Warlord Jak when the commander appeared before his subordinates. Brought messages from Grand Lord Crisis. Appeared in most episodes.
Episodes 1, 2, 9, 19 & movie: Skull Devil
The first Crisis Empire monsters to arrive on Earth actually defeats Minami, Kotaro before he can henshin into Kamen Rider Black, but of course it is destroyed after Kotaro is mutated into Kamen Rider Black RX. There were also two Skull Devils that did not have the horns.
Episode 2: Kublican
Episode 4: Gun Gadin
Episode 6: Burrowing Ten
Episode 8: Harmful Might
Episode 10: Dogmarogum
Episode 12: Zuno Warrior
Episode 14: Death Garon
Episode 16: Triplon Version 1, 2, 3 & Neck Sticker
Episode 18: Flying Squirrel Beast
Episode 20: Bya Fiend
Episode 22: Ant Runt & Shadowmoon
In episode 22 Crisis Warlord Jack tired of his subordinates failure to kill RX assigns the task to Minami, Kotaro's old enemy Shadow Moon.
Episode 25: Harmful Mantis Gill & Hamrful Gingamu
Episode 27: Mat Bot & Shadowmoon
Episode 27 features the final battle between Kamen Rider Black RX and Shadowmoon.
Episode 31: Erigitron
Episode 33: Gazoregezora
Episode 35: Will Fiend
Episode 37: Harmful Nimp & Devil Beastman Ninja Corps
Episode 38: Sky
Episode 40: Harmful Jaguarma
Episode 42: Gedeoll Ridoll - last of Gedorian's alien lifeforms
Episodes 44 & 45: Gran Zairus, The Crisis Avenger
In episode 44 Grand Lord Crisis sends his most powerful weapon, Gran Zairus, The Crisis Avenger, to Earth to kill Kamen Rider Black RX.
In episode 45 Maribaron, believing Kamen Rider Black RX to be dead, uses her magic to bring back the spirtis of 10 monsters previously killed by RX, to kill the other 10 Kamen Riders. Because they're dead spirits they are all a grayish-white in color. The Spirt World Demons are: Skull Devil (episodes 1 & 2), Meta Snake (episode 30), Zuno Warrior (episode 12), Harmful Nimp (episode 37), Mantis Gill (episode 25), Burrowing Ten (episode 6), Erigitron (episode 31) and Ant Runt (episode 22). Harmful Nimp impersonated Kamen Rider 1.
Episode 46: Jack Midora
In episode 46 Grand Lord Crisis increases Crisis Warlord Jak's power so Jak can confront RX and the other 10 Kamen Riders. In episode 47 Grand Lord Crisis takes on Kamen Rider Black RX himself.
Chaps, Crisis Empire's robotic soldiers which wore three different colored uniforms, black and white, silver and white, gold and white. There were more of the black and white then the other two. For the last 4 episodes the Chaps all wore gold capes.
Many monster photos provided by Basri Ispandi author of Dedicated To Black.